化工进展 ›› 2022, Vol. 41 ›› Issue (12): 6711-6722.DOI: 10.16085/j.issn.1000-6613.2022-0234

• 资源与环境化工 • 上一篇    下一篇

高温抗烧结吸附剂对SeO2捕集性能

杨晓域1(), 于梦竹1(), 黄亚继1(), 李金壘1, 朱志成1, 李志远1, 王圣2, 李秋白2   

  1. 1.东南大学能源热转换及其过程测控教育部重点实验室,江苏 南京 210096
    2.国家能源集团科学技术研究院 有限公司,江苏 南京 210000
  • 收稿日期:2022-02-15 修回日期:2022-04-03 出版日期:2022-12-20 发布日期:2022-12-29
  • 通讯作者: 黄亚继
  • 作者简介:杨晓域(1995—),男,硕士研究生,研究方向为气态污染物控制。E-mail:220194297@seu.edu.cn
    于梦竹(1993—),女,博士研究生,研究方向为气态污染物控制。E-mail:yumz@seu.edu.cn
  • 基金资助:
    国家自然科学基金(51976036);国家重点研发计划(2018YFB0605102)

Improved capture capacity of SeO2 by sorbents with anti-sintering at high temperature

YANG Xiaoyu1(), YU Mengzhu1(), HUANG Yaji1(), LI Jinlei1, ZHU Zhicheng1, LI Zhiyuan1, WANG Sheng2, LI Qiubai2   

  1. 1.Key Laboratory of Energy Thermal Conversion and Control of the Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China
    2.China Energy Corporation Science and Technology Research Institute Co. , Ltd. , Nanjing 210000, Jiangsu, China
  • Received:2022-02-15 Revised:2022-04-03 Online:2022-12-20 Published:2022-12-29
  • Contact: HUANG Yaji

摘要:

使用气固瞬时反应装置在700~1100℃下对不同氧化物(氧化镁、氧化铁、氧化铝、氧化钙)的硒捕集性能进行研究,确定吸附产物性质。基于此选取相应的典型矿物及双组分抗烧结吸附剂改善硒高温吸附能力。结果表明:900℃前氧化钙捕集效果最好,但1100℃时其吸附量迅速降低到167.59μg/g;γ-氧化铝在高温下捕集效果较好,1100℃时吸附量可达415.04μg/g,这与其优异的孔隙结构有关。钙基矿物方解石因其具有一定的抗烧结能力和发达的孔隙结构,表现出更好的高温捕集能力,1100℃时吸附量可提高到1064.97μg/g。双组分吸附剂高温捕集能力展现出不同程度的提高。钙-铝基吸附剂高温捕集性能提高相对较小;而钙-硅基吸附剂在高温下效果远高于单组分吸附剂,与氧化钙相比,1100℃时可提高1787.21μg/g。

关键词: 硒, 矿物, 双组分吸附剂, 高温捕集, 抗烧结性

Abstract:

Selenium (Se) capture capacity by different oxides (MgO, Fe2O3, Al2O3 and CaO) at 700—1100℃ were performed by a gas-solid instant reaction system to determine characteristics of adsorption products. Then, corresponding typical minerals and bicomponent composite sorbents with anti-sintering were chosen to improve Se capture capacity at high temperature. Results showed that the capacity of CaO was highest before 900℃, but noticeably decreased to 167.59μg/g as temperature rose to 1100℃. Capture capacity of γ-Al2O3 was greater at high temperature, which could reach 415.04μg/g at 1100℃ likely due to its great pore structure. Calcite, one of typical Ca-based minerals, indicated great high-temperature capture capacity because of its great anti-sintering and pore structure, and the capacity could be improved to 1064.97μg/g at 1100℃. Capture capacity of bicomponent composite sorbents at high temperature presented some improvement. Capacity of Ca-Al based sorbent increased slightly, while that of Ca-Si based sorbent was much higher than that of monocomponent based sorbents, which increased by 1787.21μg/g than that of CaO.

Key words: selenium, minerals, bicomponent sorbents, high-temperature capture, anti-sintering

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